Sometimes Google calendar syncing may stop working and we need to disable and re-enable the service.
Go to your Google Accounts page: https://myaccount.google.com/security
Click on "Connected apps & sites"
Click “Manage Apps”
Click on “Jasmine Practice Management”
Click the “Remove” button
Remove old Google Calendar Sync token in Jasmine
In the Setup Search box, search for “Manage Users”.
Click on “Users”
Click on your user record
Scroll down to Additional Information
Delete the GCal Sync Token